<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Css三角强化的巧妙运用</title>
    <style>
        .box1 {
            width: 0;
            height: 0;
            /* 把上边框宽带调大 */
            border-top: 100px solid transparent;
            border-right: 50px solid skyblue;
            /* border-bottom: 0px solid blue;
            border-left: 0px solid green; */
        
        }
        .price {
              width: 160px;
              height: 24px;
              line-height: 24px;
              border: 1px solid red;
              margin: 0 auto;
          }
          .miaosha{
              position: relative;
              float: left;
              width: 90px;
              height: 100%;
              background-color: red;
              text-align: center;
              color: #fff;
              font-weight: 700;
              margin-right: 8px;
          }
          .miaosha i{
              position: absolute;
              right: 0;
              top: 0;
              width: 0;
              height: 0;
              border-top: 24px solid transparent;
              border-right: 10px solid #fff;
          }
          .origin{
              font-size: 12px;
              color:gray;
              text-decoration: line-through;
          }
    </style>
</head>

<body>
    <div class="box1"></div>
    <div class="price">
        <span class="miaosha">
            ¥1650
            <i></i>
        </span>         
        <span class="origin">¥8550</span>
    </div>
</body>

</html>